Old Stone Fort State Archaeological Park.  This site describes the Old Stone Fort archaeological park in Manchester, Tennessee.  The fort was constructed at the confluence of the Duck and Little Duck Rivers.

Townsend, Richard F., ed.  page 66:  "...Woodland sacred places were chosen with care and were more variably positioned than later Mississippian public ritual locations, which were constrained by their association with nucleated villages and alluvial farmland.  Proximity to streams, springs, caves, mountains, mineral outcrops, trails; an ability to monitor celestial events against a distinct horizon; and the location of other sacred places have all been recognized as important in the selection of specific sites.  Perhaps the most spectacularly sited of these Woodland sacred places is the Old Stone Fort in central Tennessee where a rock and earthen enclosure occupies the tip of a promontory at the forks of the Duck River and is flanked by twin waterfalls.  Nearly as commanding are the many mounds that line the edge of the 150--300-foot (46-91 m) limestone bluffs of the lower Illinois River valley.  The Seip-Overly complex in south-central Ohio, which orients to Copperas Mountain, a unique 350-foot-high (106 m) black shale cliff that is home to dozens of nesting vultures and that produces quartz crystals and other minerals, provides a third example of auspicious placement."